void Date::add_month (int n) {
// Negative
if(n < 0)
{
int tmp = month();
this->m = tmp - abs(n) > 0 ? tmp - abs(n) : 12 - abs(n + tmp) % 12;
if(n + tmp <= 0) {
this->y -= (1 + floor(abs(n + tmp)/12));
}
} else {
int months = abs(n) + month();
if(months % 12 != 0)
this->m = months % 12;
else
this->m = 12;
if(months > 12 && months % 12 != 0) {
this->y += months / 12;
} else if (months > 12) {
this->y += months / 12 - 1;
}
}
if(!valid_date(year(), month(), day())) {
this->d = days_this_month();
}
this->julian_day_number = calc_julian_day_number(year(), month(), day());
}
void Date::add_year (int n) {
this->y += n;
if(!valid_date(year(), month(), day())) {
this->d = days_this_month();
}
this->julian_day_number = calc_julian_day_number(year(), month(), day());
}
//Receives input string, parses it for a date, returns 1 if valid, 0 if not
int parse_date(char* date_string, int* days, int* months, int* years) {
int len =0;
len = strlen(date_string);
if (len !=8) {
return 0;
}
if (date_string[2]!= '/' || date_string[5] != '/') {
return 0;
}
//days
if ( !is_num(date_string[0]) || !is_num(date_string[1])) {
return 0;
}
//months
if ( !is_num(date_string[3]) || !is_num(date_string[4]) ) {
return 0;
}
//years
if ( !is_num(date_string[6]) || !is_num(date_string[7]) ) {
return 0;
}
*days = ((int)date_string[0]-'0' )*10+(int)(date_string[1]-'0');
*months = ((int)date_string[3]-'0' )*10+(int)(date_string[4]-'0');
*years = ((int)date_string[6]-'0' )*10+(int)(date_string[7]-'0');
return valid_date(*days, *months, *years);
}
bool Hit::is_valid() {
if (valid_date(date)) {
return true;
}
else {
return false;
}
}
void check(int day,int month,int year)
{
int ans;
ans = valid_date(day, month, year);
if (ans == 1)
{
date(day, month, year);
}
else
printf("INVALID");
}
int isOlder(char *dob1, char *dob2)
{
int day1=0, day2=0, mon1=0, mon2, yea1, yea2, vali1, vali2;
day1 = (((int)dob1[0]) - 48) * 10 + (int)dob1[1] - 48;;
day2 = (((int)dob2[0])-48) * 10 + (int)dob2[1]-48;
mon1 = (((int)dob1[3])-48) * 10 + (int)dob1[4]-48;
mon2 = (((int)dob2[3])-48) * 10 + (int)dob2[4]-48;
yea1= (((int)dob1[6])-48) * 1000 + (((int)dob1[7])-48) * 100 + (((int)dob1[8])-48) * 10 +((int)dob1[9])-48;
yea2 = (((int)dob2[6])-48) * 1000 + (((int)dob2[7])-48) * 100 + (((int)dob2[8])-48) * 10 + ((int)dob2[9])-48;
vali1 = valid_date(day1, mon1, yea1);
vali2 = valid_date(day2, mon2, yea2);
if (vali1 != 0 && vali2 != 0)
{
if (yea1 > yea2)
return 2;
else if (yea1 < yea2)
return 1;
else
{
if (mon1 > mon2)
return 2;
else if (mon1 < mon2)
return 1;
else
{
if (day1 > day2)
return 2;
else if (day1 < day2)
return 1;
else
return 0;
}
}
return 0;
}
else
return -1;
}
/***********************************************************************
* function : date_to_int()
* purpose : converts a date string in dd/mm/yyyy format in integer
* argument :
* — char *str : the string to be converted
* return : a positive integer value if successful
* notes :
* — returns the return value of valid_date()
***********************************************************************/
int date_to_int(char *str){
int index, vld_puncts = 0, day, month, year;
char *token, tmp[BUFSIZ];
/***********************************************************************
* index -> index on str position
* date_ret -> integer date returned in yyyy/mm/dd
* token -> part of initial str when use strtok()
***********************************************************************/
/*
* Check if string is in valid format
*/
for (index = 0; index < strlen(str); index++){
if (isalpha(str[index])){
printf("\a Your input should NOT contain any letters");
return 0;
}
if (ispunct(str[index]) && str[index] != '/'){
printf("\a Your input is NOT in valid format. Seperate values with '/' symbols");
return 0;
}
else if (ispunct(str[index]) && str[index] == '/')
vld_puncts++;
}
if (vld_puncts != 2)
return 0;
strcpy(tmp, str);
token = strtok(tmp, "/");
day = atoi(token);
token = strtok(NULL, "/");
month = atoi(token);
token = strtok(NULL, "/");
year = atoi(token);
return(valid_date(day, month, year));
}
date * date_create(int year, int month, int day)
{
if (!valid_date(year, month, day))
return NULL;
for (int i = 0; i != date_pool_size; i++)
{
if (!date_pool[i].allocated)
{
date_pool[i] = (date)
{
.allocated = true,
.year = year,
.month = month,
.day = day
};
return &date_pool[i];
}
}
return NULL;
}
